Meta Details WhatsApp and Messenger Interoperability to Comply with EU's DMA Regulations
ID: 4a440b64-8209-5523-b9b4-2589ae98d2ea
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Feed Name: The Hacker News
Meta has published technical details on how it will provide interoperability between WhatsApp/Messenger and third-party messaging services to comply with the EU Digital Markets Act. The plan mandates the use of the Signal Protocol for end-to-end encryption, packaging messages as XML stanzas, XMPP-based connections for third-party clients, and a WhatsApp Enlistment API with cryptographic proof of identifier ownership; it also allows third parties to introduce proxies or intermediaries. Meta warns this approach may degrade safety signals (e.g., TCP fingerprints) and increase the risk of chat metadata exposure via proxy servers.
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